Sorry for playing the devil's advocate but policing officers being stupid or arrogant and behaving with contempt for the law is not an American exclusive.
In Canada and many European countries they do the same, too.
In Canada and many European countries they do the same, too.
But as a super privileged white German the US border control (around 2009) was definitely the harshest I have experienced.
I travelled to many places in Africa, Asia and South America as well, never had been questioned and probed like i was in the USA. Ofc i cant speak to the experience in EU.
Edit: added date
The last time I travelled to Mozambique, some “security person” armed with what looked like an AK47 (I don’t know firearms), asked me to see my passport. He then proceeded to demand payment, uhm, I mean ransom. At the airport.
That’s far far scarier than anything I’ve experienced at a U.S. airport, even as a foreigner.